\documentclass[10pt, compress]{beamer}
\usepackage{latex_style/packages}
\usepackage{latex_style/notations}
\usepackage[light,sectionframe]{latex_style/beamerthemesolarized} % if the .sty file is in ../

\addbibresource{./references.bib}

\title{}
\subtitle{}
\date{\today}
\author{}
\institute{}

\begin{document}

\maketitle

\begin{frame}{Contents}
	\tableofcontents
\end{frame}

% First section
\section{Motivation}

\subsection{History}

\begin{frame}{Introduction}{Model}

	% Blocks
	\begin{block}{Block title}
	\end{block}

	% Columns
	\begin{columns}
		\begin{column}{0.48\textwidth}
			\begin{figure}
				\hspace*{-0.68 cm}
				\includegraphics[width=6.7cm]{ph_diag.pdf}
				\vspace{-0.20 cm}
				\caption{caption}
			\end{figure}
		\end{column}

		\begin{column}{0.5\textwidth}
		\end{column}
	\end{columns}
\end{frame}


\section*{Bibliography}
\begin{frame}[allowframebreaks]
	\frametitle{References}
	\printbibliography
\end{frame}


\end{document}
